But Mr. Samuel told detectives that his mother and Mr. Peters had an argument on Saturday over a hand written letter that his mother had received, the official said.

WSJ: Two Killed by Police Officer, Who Kills Herself

On Tuesday, farmer Engelbert Bergmann, 55, from Frankfurt, received a letter written by soldier Emil Adam, a neighbour of his grandfather.

BBC: WWII letters from German soldiers delivered 71 years late

He said that he had written a personal letter to Bush after the debate asking for an apology but had not received a reply.

CNN: Ex-Russian prime minister wants apology from Bush